<h3>描述</h3>
<p>服务方式用法展示</p>
<p>新增start、drag、stop事件参数，参数类型为TiDraggableEvent</p>
<h3>示例</h3>
<div class="container">
  <div #draggable class="blockCls" style="position: absolute">absolute div</div>
</div>
